Firmware update - STM32F756 Internal / QSPI

[Dushyantsingh]

I have board using a STM32F756 that I need to update the firmware from internal flash. I am  able to copy .bin file from an external  flash to internal flash  (Using QSPI).  I do NOT want to execute the code from the external location. It is just a temporary storage space.

the below steps i followed:

1. Receive program code (compiled binary) over serial connection, and write to external flash (QSPI )
2. Verify program data was received without errors (checksum)
3. Copy program from external flash into MCU internal flash (FLASH_STORAGE_3  0x08018000)
4. Reset MCU to run new code

Till step 3 everything is working fine but facing issue while jumping to internal flash address (where i have copied the bin file from external flash to internal flash )

here is the jumping code: 

             JumpAddress = *(__IO uint32_t*) (FLASH_STORAGE_3 + 4);

             Jump_To_Application = (pFunction) JumpAddress;

             __set_MSP(*(__IO uint32_t*) FLASH_STORAGE_3);

             Jump_To_Application();

in .bin file (i have written blinky code) but it's not blinking it's always high

Could you please take a look and suggest what is the issue ??

Thanks

[MM..1]

You skip info , how you build bin. Based on used IDE for place builds on nonstandart addr is required special changes. Primary interrupt table possition ...

[Tesla DeLorean]

Make sure the code is built properly for the new address, the vector table,and the settings of SCB->VTOR in SystemInit()

Personally I'd just let the code set the SP as the first thing it does in Reset_Handler.

Use the debugger, step the code, understand what it's doing, where it's going, why its failing. Add check-points so you can see how far it gets into the code, and where it goes.

Have workable HardFault_Handler() and Error_Handler() to you can identify quickly why/where it's getting into them from. Output actionable data, dying silently in a while(1) will tell you nothing.

[Dushyantsingh]

Thanks  @Tesla DeLorean  for quick reply

Able to built properly for the new address and i have updated the SCB->VTOR in SystemInit()
SCB->VTOR = 0x08018000; but still facing the same issue, actually it's hitting the application code  but it execute only one instruction ( able to turn on the LED but it's not going in off mode )
                  HAL_GPIO_WritePin(SYS_LED4_PORT, SYS_LED4_PIN, GPIO_PIN_SET);

                 HAL_Delay(1000);

                HAL_GPIO_WritePin(SYS_LED4_PORT, SYS_LED4_PIN, GPIO_PIN_RESET);

                HAL_Delay(1000);

[MM..1]

In system xxx .c code exist lines 

  /* Configure the Vector Table location add offset address ------------------*/
  #ifdef VECT_TAB_SRAM
    SCB->VTOR = SRAM1_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
  #else
    SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
  #endif

then for your code required is define offset ...

/************************* Miscellaneous Configuration ************************/
/*!< Uncomment the following line if you need to relocate your vector Table in
     Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET  0x00000000UL /*!< Vector Table base offset field.
                                   This value must be a multiple of 0x200. */
/******************************************************************************/

[Tesla DeLorean]

Have you disabled interrupts on the MCU, completely?

Is SysTick working?

How is the LED wired? If using a resistor to VCC, then a LOW on the pin will luminate.